ChangeLog for relevant heap-protection changes

Version 2.25

All attacks in this repo work at least in this version.

tcache (per-thread cache) is introduced (enabled in ubuntu-build since 2.27)
- See tukan.farm for a short overview

unlink(AV, P, BK, FD):

Add size consistency check:

    if (__builtin_expect (chunksize(P) != prev_size (next_chunk(P)), 0))
      malloc_printerr ("corrupted size vs. prev_size");

malloc_consolidate(mstate av):

Add size check when placing chunks into fastbins:

unsigned int idx = fastbin_index (chunksize (p));
if ((&fastbin (av, idx)) != fb)
  malloc_printerr ("malloc_consolidate(): invalid chunk size");